Remove SCons building system
While SCons building system was serving us really good for ages it's no longer
having much attention by the developers and started to become quite a difficult
task to maintain.
What's even worse -- there started to be quite serious divergence between SCons
and CMake which was only accumulating over the releases now. The fact that none
of the active developers are really using SCons and that our main studio is also
using CMake spotting bugs in the SCons builds became quite a difficult task and
we aren't always spotting them in time.
Meanwhile CMake became really mature building system which is available on every
platform we support and arguably it's also easier and more robust to use.
This commit includes:
- Removal of actual SCons building system
- Removal of SCons git submodule
- Removal of documentation which is stored in the sources and covers SCons
- Tweaks to the buildbot master to stop using SCons submodule
(this change requires deploying to the server)
- Tweaks to the install dependencies script to skip installing or mentioning
SCons building system
- Tweaks to various helper scripts to avoid mention of SCons folders/files
as well
Reviewers: mont29, dingto, dfelinto, lukastoenne, lukasstockner97, brecht, Severin, merwin, aligorith, psy-fi, campbellbarton, juicyfruit
Reviewed By: campbellbarton, juicyfruit
Differential Revision: https://developer.blender.org/D1680

SCons: Fix for really nasty bug with polluting configuration environment
The issue was caused by the following construction:
def = env['SOMETHING']
defs.append('SOMETHING_MORE')
Since first assignment was actually referencing environment option it was totally
polluted hawing weird and wonderful side effects on all other areas of Blender.

Audaspace: fixing problems for the merge to master suggested by Campbell and Sergey.2015-06-16T08:03:35ZJörg Müllernexyon@gmail.comJörg Müllernexyon@gmail.com2015-06-16T08:03:35Zhttps://git.blender.org/gitweb/gitweb.cgi/blender.git/commitdiff/a0cbebf404d6c46e59b090e7217ce39d7e760809

Merge with trunk up to r38584.2011-07-21T21:11:58ZJoerg Muellernexyon@gmail.comJoerg Muellernexyon@gmail.com2011-07-21T21:11:58Zhttps://git.blender.org/gitweb/gitweb.cgi/blender.git/commitdiff/4532bd731d5edbe348d4df810856f6bdfdea705c

move mathutils into its own lib.2011-07-15T04:01:47ZCampbell Bartonideasman42@gmail.comCampbell Bartonideasman42@gmail.com2011-07-15T04:01:47Zhttps://git.blender.org/gitweb/gitweb.cgi/blender.git/commitdiff/3a6158a8bf2b5518ef3a126b003debeba6bbea90

Code cleanup: remove source/kernel module, this wasn't really the kernel of
anything, only contained a hash map and functions to pass command line args
to the game engine. Moved those to container and BlenderRoutines modules.